Elevator-shaft door.



' opening is notffraised so .far as to diaen-` i gage'the guide rail from the shoe 10 below. the sill.' The upper 'door is vprovided with1 a recess in the upper frame member so shoe and the guide rail 6 of the lower door, the bottom T iron ofthe frame is provided in. that flange which faces the `shaft wall 14 witha recess 15 shown in Figs. 5, 6 and 7. This recess permits the bottom edge of the lower door to pass theshoe heldfdirectly below thefsill as shown in Fig. 2 and then `as the door is lowered, the shoe can engage the flanged guide rail 6. As the door is-moved up ordOWn, the guide rail 6 moves vertically through the shoeand `is .never vdisengaged from the same for the reason that the lower door when raised to close the door that the upper shoe, which is located at the lintcl, can be engaged "withthe guide railf6 of the upper door, simply by'moving the- 'doornpwardand the guide rail 6 of the' -upper door will at all times remain in `engagement with the shoe 10 at the lintel,

whether the door is opened, closed or artly opened. .Thelower shoe' 10 at the sil pre vents the lower door from dropping in case thefchains break, as the flanges of thetop T- bar of the frame rest upon the brackets. 12

' ofthe shoe when the door is lowered and thus these brackets of the shoe form asupport for the lower door to prevent sagging y ofthe door at the middle when heavy trucks are passed-over the; same and as stated it `absolutely prevents the lower door -from dropping. The upper door 'oweven could `drop 1n case of 'breaking of'fherohems as the upper T-bar of the frame is recessed in the same manneras the T-iron of the bot- I tom member of the lower door is recessed as at 15.

To prevent the upper door from 'dropping a metal bar 16; is placed over the recess in the flange of the upper member of the 1 upper door and this plate is preferably held in place by tap' screws 17 and' nuts L18.

- This plate. is-only applied' on "said upper member of the frame of the upper door after the guide rail .6 'of the upper door has been engaged with the shoe at the lintel. If now,

the chains break, the upper door cannot de-' scend any farther than to closed position and cannot drop all the way down the elevator shaft as it is held by said plate 16.

The additional guide rail prevents `forcing the doors inwardtoward the elevator shaft as the anges orprojecting edges of the guide rail 6 are engaged with the undercut brackets 12 of the shoes, whichk preventV all horizontal transverse motion of the door and always hold the' doors close to the wall.

The shoel 10v and its undercut `brackets completely closel the recess'l in the ange of the bottom member of the lower door when said door is raised as indicated in dotted lines in F ig. 7 and thus close the openlng through'which any Haine vor smoke could pass. In the same manner the .shoe of the "upper door closes the recess 15 in the flange of the -upper member ofthe upper-door when said door is closed and also prevents the passage of smoke and flame.

As shown in IFig. 3 I may provide more than one additional guide rail 6 for doors of considerable horizontal dimensions between the side edges, said guide rails and shoes being constructed in the same manner as described.l l

The guide member or'members 6 of each door-section will strengthen and stillen the...

door section and rigidly connect the vupper and lowerv member of each door section. iiivdependently ofthe connection produced by ingfloor, and vice versa, especially when the i wheels of the truck meet the top member of thelower doorsection at opposite sides of such guide member or members 6;

'Having described my invention what I I claim as newand desire to vsecure by Letters :4A

Patent is The combination with two door sections mounted to slide vertically lfrom and toward i each other iny thesame vertical plane, one

section being "adapted to moveto the sill of the door opening'to be closed by said doors,

and the other to moveto the linie"- .of said opening, of a recessed shoe attached to the lintel of the door opening,v 'a guide member.

on the upper door section extending from.

the upper edge to thelower edge of .the-

same'and fitting said shoe, a recessed shoe4 secured directly below the sill of the door' opening, guide member attached to the lower door section and extending from the yupper to the lower edge of the same, which guide memberis engaged by the last `said shoe, all substantially as described., whereby both door vsections are strengthened and stiened between the side edges.

` Signed at New York city, .borough` of Manhattan, in the county of New York .and State of New, York this 30th day "of June,

Agn 1915.

llitnesses:

MARION SHAW, P UL H. FBANKE.

BENJAMIN WEXLER. 

